- Obituary (1798 Hits)
- Obscurity (2856 Hits)
- Officium Triste (1355 Hits)
- Omission (1244 Hits)
- Omnium Gatherum (152 Hits)
- Onheil (846 Hits)
- Onkel Tom Angelripper (923 Hits)
- Onslaught (1590 Hits)
- Oppressus (1514 Hits)
- Orae (1368 Hits)
- Orden Ogan (1353 Hits)
- Out For Blood (923 Hits)
- Outrage (JPN) (424 Hits)
- Overkill (1267 Hits)
- Ozzy Osbourne (1431 Hits)